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"I want to say truly, from my heart, that I apologize, and I want to say most people can't feel y'all pain, but I truly could," Thomas told the court.

Thomas was already suspected of at least six robberies in Milwaukee, West Allis and the Town of Brookfield when Sharwani was killed.

He was arrested within 12 hours of the shooting at his home. Police said he confessed but claimed the gun went off when Sharwani grabbed him as he tried to hop over the counter.

"A gun is a tool, and it has to be operated by an individual and the individual makes the choice. The gun doesn't make the choice," Judge Lloyd Carter said. "The gun is a piece of equipment. When you pull the trigger you can't call the bullet back and you can't undo the damage it causes."

"You were the triggerman, which has been obviously stated," Carter continued. "You were the man with the gun. You were the man with the decision in his hands and you made the decision to ultimately pull that trigger."

Sharwani's family members chose not to address the court and declined to comment after Thomas' sentencing.

Another man, Darrin Malone, was sentenced last month on a felony murder charge for his role in the attack. The getaway driver, Jerica Cotton, pleaded guilty to a felony armed robbery charge and was also sentenced last month.